Assembled SMC Brake Bar Racks using the SMC 6 Bar Rack frame, SMC Tie-Off Bar, and 5 stainless steel bars. Generally, the stainless steel bars will provide longer wear and avoid aluminum deposits on your rope. The twisted eye positions the rack in the correct alignment when using a rescue harness with a front D-Ring or when clipped into an anchor for a lowering system. The traditional straight eye works well with caving and climbing harnesses.